But nowadays many racers, major performance ring manufacturers like Federal Mogul/Speed-Pro, and even the new car manufacturers recommend that the second ring should have a larger gap than the top ...

Tech | Piston And Ring Technologies Whether you're considering new cars, or the high-performance aftermarket, engines are being built with more power than ever before.

Each ring has gap, which serves two purposes - it enables you to take them out or put them back in their niches on the piston, as well as allowing you to measure how much worn they are.

But nowadays many racers, major performance ring manufacturers like Federal Mogul/Speed-Pro, and even the new car manufacturers recommend that the second ring should have a larger gap than the top ...